Hose coupling



April 20, 1937. E. H. TOMPKINS HOSE COUPLING Filed May 2, 1936 INVENZOR Emerson H. T0mphm5 A RNEY Patented Apr. 20,1937.

UNITED STATES 2,077,864 nosE COUPLING Emerson H. Tompkins, Waterbury, Com, as-

signor to Scovill Manufacturing Company, Wzzterbury, min a corporation of Connecticu Application May 2, 1936, Serial No. 77,552

' 2 Claims.

This invention relates to hose couplings, and more particularly to a coupling adapted to be attached to a gasoline hose having an interior flexible metal liner commonly covered with rub 5 her and woven fabric.

One object of this invention is to provide a gasoline hose coupling of the above nature having an outside body member adapted to be screwed upon the exterior of the hose fabric, and

a wedge screw mounted within the interior of the body to expand the end of the hose outwardly against the surrounding body member to effect a tight seal therebetween.

A further object is to provide a hose coupling of the above nature in which the wedge screw is provided with an unthreaded reduce'd extension adapted to enter the flexible metal lining in the interior of the hose when the coupling is being screwed into position and to thereafter prevent twisting or unlocking of the overlapping helical convolutions of said metal lining.

v A further object is to provide a hose coupling of the above nature 'in which the interior of the body section is stepped to provide an outer annular shoulder for the outer fabric of the hose, and an inner annular shoulder into which the end of the metal liner and surrounding portion of the rubber hose will be expanded when the wedge screw is screwed into position.

A further object is to provide a gasoline hose coupling of the above nature which will be simple in construction, inexpensive to manufacture, easy to install and manipulate, compact, and very efiicient and durable in use. r

With these and other objects in view, there has been illustrated on the accompanying drawing one form in which the invention may be conveniently embodied in practice.

In the drawing: Fig. 1 represents a longitudinal sectional view of a gasoline hose coupling embodying the invention.

Fig. 2 is an end view of the same.

In the use of threaded hose couplings having an interior short wedge member for entering the metal lining of a rubber and fabric covered gaso line hose, it was foun-i that the action'of screw ing the coupling upon the end ofthe hose was quite apt to unlock the end convolutions of they metal lining. Consequently, there was danger that when the hose adjacent the coupling was subjected to severe bending stresses, the hose would yield and an unlocking action of the metal lining would travel along the helical strips until it reached the exterior of the coupling member.

outer fabric tapped shell .I l. The inner end of the interme- ,apart not only when the coupling is being screwed into position upon the end of the hose, but ,dur- 15 ing the-subsequent use of the gasoline hose.

This application is a continuation in part of a prior copending application by the same applicant filed October 10, 1935, Serial No. 44,337, for Hose couplings. w 20 Referring now to the drawing in which like reference numerals denote corresponding parts. throughout the several views, the numeral In indicates generally a hollow male coupling member consisting of a rear octagonal-shaped shell ll 5 and a forward smaller cylindrical section l2 having exterior threads I3.

' Theshell II is tapped to provide an interior thread M which is adapted to engage upon an outer fabric l5, such as canvas, of a gasoline 3O hose l6, herein shown as of the conventional type. The hOSe is also provided with a flexible metal lining I! made from helically wound strip of metal having overlapping interlocking opposed grooves, and an intermediate soft rubber filler l8 surrounded by the -canvas covering IS. The inner end of the shell II is preferably formedwith-an outwardly fiared skirt l9 to facilitate the insertion of the'hosetherein.

- tightly into the interior of the gasoline hose.

The intermediate portion of the wedge screw 2! is tapered at 23 for causing it to wedge against theinner metal li'ner l1 tightly to expand it out- 5 wardly and compress the rubber filler i8 and covering outwardly against the diate tapered section 23 terminates in a rearwardly extending reduced cylindrical neck extension 24 which is adapted to fit tightly within the metal liner IT. The extension 24 serves to prevent the expansion and unlocking of the convolutions of the helically wound liner IT. The inner end of the neck extension 24'is beveled at 25 to facilitate its entrance into the liner H.

In order to provide a more effective seal for the end of the hose I6 in the inside of the shell H, provision is made of an annular shoulder having two steps 26 and 21.

Operation Before assembling the coupling member upon the hose the wedge screw 24 will be screwed outwardly for a short distance by a suitable T-ended tool, not shown, and the shell portion II will be screwed upon the outer covering N of the hose as far as it will go. The wedge screw will then be screwed to the left by saidtool, as viewed in Fig. 1, causing the conical section 23 thereof to expand the end of the metal lining l1 and force it into abutment with the inner step 21 of the shoulder in the shell II. The sharp corner of said shoulder between the steps'26 and 2'! will thus become embedded in the hose covering l5, thereby producing a more efiective liquid-tight seal. The tightness of this seal will be still further enhanced due to the inward crowding of the covering I5 against the rubber filler 3 during the first operation of assembling the coupling described above.

This is caused by the fact that the covering will strike the outer step 26 before the rubber filler I8 and metal lining H. The inner step 21 also serves to limit the expansion of the metal lining l1, and thus prevents it from cutting the rubber filler l8. helical convolutions of the lining H in parallelism The extension neck 24 holds the with the axis of the hose and prevents the possi- 0 bility of any unlocking of said convolutions and possible leakage to occur.

While there has been disclosed in this specification one form in which the invention may be embodied, it is to be understood that this form is shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosure but may be modified and embodied comprising an interiorly threaded hose receiving section and an attachment portion, an interior wedge sleeve screwed into said attachment portion, said sleeve having an intermediate tapered section and a cylindrical neck extending therefrom a substantial distance and adapted to engage snugly within the interior of the metal liner of a flexible hose assembled to the hose receiving section of said coupling, said tapered section being adapted to expand the end of said hose into liquid-tight engagement with said hose receiving section, said neck having a beveled extremity to facilitate the insertion of said neck into the interior of said hose liner.

2. In a hose coupling, an exterior body member comprising a'hose receiving section and an attachment portion, an interior wedge sleeve screwed into said attachment portion, said sleeve having an intermediate tapered section and a cylindrical neck extending therefrom a substantial distance and adapted to engage snugly within the interior of a flexible hose assembled to said coupling, said tapered section being adapted to ex-- EMERSON H.'TOM:PKINS. 

